This article clarifies how Alzheimer’s disease differs from other common dementias—such as vascular dementia, Lewy body dementia, and frontotemporal dementia—so families can spot key early signs, understand how symptoms progress, and pursue the right care. It explains hallmark features (for example, memory loss in Alzheimer’s, fluctuations and visual hallucinations in Lewy body, behavior or language changes in frontotemporal), why an accurate diagnosis matters, and how clinicians use history, cognitive testing, labs, and imaging to rule out treatable causes. Readers will learn how tailored strategies—medications, managing vascular risks, avoiding certain drugs, therapy and routines, safety planning, and caregiver support—can improve quality of life, set realistic expectations, and connect them with trusted resources.